Glass-cutter.



W. L. MQNRO.

GLASS CUTTER.

APPLICATION FILED MARJS, 1908.

1,1 24,784. Patented Jan. 12, 1915.

3 SHEETS-SHEET 1.

In van i0);

W. L MONRO. GLASS CUTTER.

APPLICATION FILED MAR.13,1908.

Patented Jan. 12, 1915.

3 SHEETS-SHEET 2.

W. L. MONRO.

GLASS CUTTER. APPLICATION FILED MAILIS, 1908.

Patented Jan. 12, 1915.

3 SHEETS-SHEET 3.

INVENTOR WITNESSES 'WELLIA'M L. MONRD, G15 PITTSBURGH, PENNSYLVANIA,ASSIGNOR TO WINDOVJ' GLASS NE COMPANY, OF PITTSBURGH, PENNSYLVANIA, ACORPORATION OF NEW GLASS-CUTTER.

Specification of Letters Patent.

lPatented Jan. 12, 191

ltpplication filed March 13, 1908. Serial No. 420,990.

rel "Z lax/mm. it may concern.

a citizen oi the United States, residing at and oth mrgh, in the Stateof Pennsylvania, inrentcd certain new and useful Imin GlassCutters, ofwhich the 1s a specification.

\ention relates particularly to rr cuttinground articles such as rulersmade for window glass, and s primary object is to provide means for:utting and slitting from the interior in any desired position and toproperly regulate the pressure on ill}! cutting tool, as well as o pro-ly balance the cutting tool n place crwise improve its construction andoperation will hereinafter appear. the accompanying drmvings l have ownfor illustration several forms of the '1 shows a partial cross-sectionof .s

a large gl ylinder and an elevation of the cutter and operating meanstherein, the plane of section being on. the dotted line (2) of Fig.shows a vertical section a l a a through the cutter actuating cylinderand support. is 3 is a similar section of anotocr form of c 'linder; F1g. lis a horizontal ion through the center of Fig. 3; Fig. 5 ws the modeof mounting, and also a 11;; cutter; Fig. 6 shows another form linder;Fig. 6 shows still another modiin which a flame is used as the out tool;and Fig. 7 a convenient form of I operating valve; Fig. 8 is a Viewpartly in side elevation and partly in vertical section,

and showing the mounting for the form of my invention illustrated in Ti3 and 4-.

Herctolorc in the [lat toning of large cylintiers of it has beencustomary to cut the cylinder into lengths by a hot wire or st mg oiglass applied to the external surface, and this largely because it wasdiilicult to operate on the inside of the cylinder. null. the'presontmethods of cutting do not sever the cylindzlr along a true circle andin, slow and cumbersome. By

llllCGl. my nvention i cut the glass on a true circle with a diamond orroller or heat jet, etc,

and may operate on cylinders of irregular form. I also provide means forefiiciently slitting the cylinder. Thus in Figs. 1, 2 and I provide along and rigidly supported tube 5 which extends into the cylinder to theo desired position and is mounted to be revolved and movedlongitudinally in any way that may be convenient, as by mounting insuitable supports 20 and providing a handle 5, whereby the device may berotated (see Fig. 5). On the end of the pipe 5 in av coupling 6 l asmall cylinder 7 into which compressed air or steam may be introducedthrough. the pipe 5 by means of the connecting pipe 8. The cylinder hasa piston 9, whose stem 10 carries at the outer end a cut ting tool 11,such as a roller. The piston is normally held and withdrawn. by means ofa spring 12, and is thrust out to make contact with the glass cylinder Cwith any pressure desired, by meansof the air introduced through pipe 8.Preferably I use an escape valve 13 in order to avoid the possibility ofthe pressure on the tool becoming too great if the cylinder should beirregular and force it in *ard against the air pressure behind thecylinder.

It will be understood that "for operation the supporting pipe 5 isplaced approxiumtely in the center of the cylinder C and then air beingintroduced behind the piston, the tool 11 makes contact with thecylinder. 'lliercupon the pipe is rotated to cut the glass in a completecircle.

In order to more perfectly center the cutting tool, and provide forbetter balancing the pressure and making it imuccessary to turn the toolthrough more than 180 degrees, l sometimes use the dcrice as shown inFigs. 3 and 4', which is also designed to more easily introduce thecutter into cylinders having small openings at the end. On the end orthe supporting pipe 5 mounted in any con-- venient bearings, I provide aswivel joint comprising the casing 14 and hollow stem 1-5 of thecylinder casing 16. In the casing 16 is mounted a cylinder 17 whichcommunicates with the pipe 5 through the openings 17 and It will be seenthat the cylinder 17 can thus turn on a pivot until it is alined withthe pipe 5. This may be con veniently done by means of a rod 19, aud ostop 18 is providedin order to hold the cylinder 1'7 exactlyperpendicular to the pipe 5 when in operative position.

The pistons 9 are subjected to the same 7 air or steam pressureintroduced through rollers. as in the first described modification. Thecylinder '17 being turned into line are ' with the supporting pipe bymeans of rod l9, which may be easily inserted into the cylinder and theyengage the cylinder with the same pressure thus balancing the tool inthe center. On giv g the pipe 5 a half revolution the cut is made whenby a slight tap the cylinder will be separated, as will be understood.

In Fig. 8 I have shown the complete mounting for the device 01 Figs. 3and 4. .This mounting is substantially the same as that shown in Fig. 5.

By. means of this device an internal out can be made with uniformpressure and in a correct line-and a cylinder can be cut up into lengthsfor flattening into sheets without waste of glass. Of course by omittingone of the tools 2l and drawing the other tool along the length thecylinder also can be split as will be understood. But I prefer to usethe special slitting cutter shown in Fig. 5 and also in Fig. 8. On thelongitudinal sliding pipe 5 is pivoted an arm 28 which carries a diamondpoint scoring tool 30 and is normally held in raised position byretractile spring 29. After the circular out has been made the cutter 30is drawn down by means of a link 81 and handle 82, and then by merelydrawing the tool longitudinally of the cylinder the out is made.

In Fig. 6 is shown an alternative means of operating the cuttersbalanced as in Fig. 3. I prefer rather than using the spring return, toprovide a supplementary air pipe 24- which may conveniently be placedinside the pipe 5, and it has two branches 25 which connect with acylinder in front of the pistons 9. The casing 23 is supplied directlyfrom pipe 5 as in Fig. 3. lVhen the cutting operation is finished thecutting tools ll are withdrawn by exhausting theair between the pistonsin the casing 23 through the pipe 5 and admitting air through pipe 24 infront of the pistons, as indicated in Fig. 6. A convenient form offour-way valve for this purpose is shown in Fig. 7 where the casing 26has four connections indi .cated, and the revolving plug 27 operates allfour passages as will be evident. This valve may be placed in anyconvenient position, as in place of the valve 22 shown in Fig. 5, andconnected to the hose 21.

I do not desire to limit myself't-o the particular constructions which Ihave herein shown and described, since it is obvious that theseconstructions may be modified in various ways without departing from thespirit and scope of my invention as defined in the claims. It is also tobe understood that I am not-l1mite d to any particular cutting means butmay use jets of flame in place of the cutters 11 and 21, etc., as shownin-Fig. 6 where 33 is an air pipe, 34 a gas pipe and 35 two jet burnersin the usual blowpipe form.

Having thus described my invention and illustrated its use, what I claimas new and oesire to secure by Letters Patent, is the following:

1. A device for operating upon the inside of a hollow glass cylinder,comprising a rotatable member, a support on which said member is mountedfor horizontal: longitudinal movement and also for rotation, a cuttingtool carried by said member, and rotatable therewith about the axis ofthe glass cylinder, said support being independent of the cylinder to becut; substantially as described.

2. A device for operating upon the inside of a hollow glass cylinder,comprising horizontally movable supporting truck, a hollow p'pe memberrotatably supportedthereon, and a cutting tool carried by said memberand rotatable therewith about the axis of the glass cylinder;substantially described.

3. A cutter for glass cylinders comprising a revoluble support andapivoted c; thereon, provided with twoepistons having rods with cuttingtools, the cylinder being thereby adapted to act on both tools and tofold on its support together with means for supplying a motive fluid tothe cylinder,

substantially as described.

4. A device for operating upon the inside of a hollow glass cylinder,comprising a retatable member, a cylinder pivotally connected thereto, apiston in said cylinder, a cutting tool carried by the cylinder, meansfor admitting motive fluid to the cylinder,

and means for changing the angular relation between the cylinder andmember stantially as described.

5. The combination with a rotatably mounted supporting pipe and a fluidsupply, of a cylinder pivoted on said pipe and supplied with fluidtherefrom, two pistons in the cylinder and cutting tools on their rods,substantially as described.

6. A device for operating upon the inside of a glass cylinder,comprising a rotatable, longitudinally movable member, a radiallymovable cutting tool carried by said member 1 to be rotated therewith, alongitudinally acting cutting tool also carried by said member, andmeans for moving the last named tool into and out of cutting posh tion;the two cutting tools being at different angles, substantially asdescribed.

7. A device for operating on the inside of a. cylindrical glass article,comprising a rotatable hollow support adapted for con,- nection with asource of fluid pressure supsub ' ome ply at one end, a cylinder havinga, pivoteii connection With'the other end of said sup: port, saidcylinder also having a supply conmotion with the hollow support, apiston in said cylinder, and a. severing tool carried by the piston;substantially as described.

8. A device for operating on the inside of a cylindfical glass article,comprising a rotatable hollow support adapted for 0011 nectionwith asource of fiuiil pressure supply at one end, scylindei having a pivotedconnection. with the other end of said support, and also a supplyconnection with iohe said support, a piston gether with a severing toolcarried by she piston tomeans for engaging said cylindex for urning ii;on its pivot; substantially as described.

o In testimony whereof I have here lniier signed my name in the presenceof the two subscribed Witnesses.

WILLIAM Mo mo; Witnesses: I

Amos A.- TRHL,

HARRY O. HEMMIQK.

in said cylinder,- and

